Sheet-holding device



Dec. 11, 1928. 1,694,720

5. H. PLUM. 2D

SHEET HOLDING DEVICE 7 Filed sb t. 14, 1927 Patented Dec. 11, 1928.

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STEPHEN HAINES PLUM, 21), OF hEJiDIEON, NEW" JERSEY, ASElIG-N'Glt.hIiEEIlICAIxl TYPE JEOUNDERS COl liPlLhlY, A CORPORA'TTUN OF NET/iJEHSIESI'.

SHEET-HC/LDTNG DEVICE.

Application filed September M, 1927.

This invention relates to improvements in sh eetholding devices for useon platen pri ntin presses. The object of? the invention is to provideimproved sheet holding devices a lingers adapted to be mounted on aplaten adjacent its upper or forward edge for the purpose of holdingdown the edges or corners of a sheet after it has been printed. so toprevent the sheet -l'rom curling or buckling and thus facilitatemechanical or pneumatic. delivery.

The invention relates particularly to sheet holding devices of the kinddisclosed in. the ll. S. patent No. 1,536,351, dated. May 5. 1925. Inthis patent the sheet holding device romprises a linger bar mounted tooscillate near the upper edge of the platen. To the bar is secured aplurality of holders adapted to be adj usted parallel with the platen.The hold ers carry lingers adapted to reach in over the platen and catchthe corners of the sheet.

It is a specific object of this invention to provide improved. holdersand lingers adapt ed to be mounted on. the linger bar. the latter beingoperated in the manner shown in the patent referred to.

To this end the invention is embodied in a sheet holding deviceconstructed and an ranged as hereinafter set "forth and as illustratedin the accompanying drawing in which Fig. 1 is plan view of a platen ofthe type used in a Chandler & Price platen press equipped with sheetholding devices embodying the invention. parts being broken away.

Fig. 2 is a view at right angles to thgure 1.

Fig. 3 is an enlarged detail view ot the device.

Fig. 4; is a View at right an gles to Figure 3.

lie'l errilig to the drawing, the TOCFQJTG'HCO nun'ieral 5 denotes aplaten which. is opera ted and constructed like a platen in a Gordonpress, or a. platen press of the well known Chandler & Price type.

Underneatl'i the rear corners of the platen there are secured twobrackets 6 and 7 torming liiearings in which is journaled a holder shaft8. which. at one end carries an, arm 9 to which is pivoted at 10 anoperating lever 11. The other end of the lever 11 pivotally con nectedto the press in any suitable manner not shown, but disclosed in the saidpatent.

The other end of the shaft 8 carries a stop arm 12 having a stop 13adapted to engage the bracket to limit the movement of? the holder shaftin a. direction away from the platen.

Serial No. 219.411.

On the holder sh aft 8 there are zuljustaliily iounted two lingerholder... Each holder comprises a base 15 mounted to slide on the shaftand held thereon in adjustable friction-d relation by means of a spring16 adapted to engage a serrated or toothed. portion 1? of the shaft. Thebase carries an upstanding threaded stem or post 18 and sprin pa wl ll.)having a tooth 20.

A sleeve 21 isin threaded engagement with the post 18 and is at itsupper eno termed with ahead 22 which carries a curved linger chan nelguide 23. The sleeve 21 is knurled as at 24. Through the charmel passesa linger 25 made of very thin spring steel.

The hail of the platen is marked 1-1 and the sheet 26.

In operation the holder shaft 8 is oscillated with. respect to theplaten in a well known manner and whereby the lingers 25 are caused todescend upon the sheet 26 to prevent its delivery edge 2T trom curlingso it cannot be gripped by the sheet i'einoviu i'neans a liter it hasbeen printed. At other times the shaft 8 is oscillated. to remove thelingers from. the platen as is obvious in order to permit the sheet tobe printed.

The finger holders are adjustable along the holder shaft 8 by a merepushing motion which causes the holding spring 16 to slide over theteeth 17. The lingers 25 are vertically adjustable by screwing thesleeve 21 up or down on the p 0st 18 during which movements the springtooth. slides or slips over the knurls 24-. When it has been adjustedvertic-all' the spring lIOUlll. 2O prevents accidental. rotation. ln theother hand. when once the sleeve 21 has been adjusted vertically, it maybe turned more or less on the post 1.8 to adjust the fingers angularlyor laterally on the platen.

A. further adjustment is provided in that the finger maybe pulled orpushed through the channel. guide to adjust the linger reach in over theplaten. A still further advantage ot' the eonstructi on is that by amere turning movement the fingers may be moved away or outside of theplaten to permit the platen bail to be lifted.

it will be seen therefore that the sheet holding lingers according tothis invention are adjustable vertically. horizontally andlongitudinally. i. e. lengthwise of the fingers 2 5,. and that theholders are adjustable axially on the shatt S. This invention thereforeprovides all the adjustments required in order to areonnnodate all sizesof matter to be printed. 'lfhe entire absence of screws, clamps or boltsa feature providing quick adjustment and eliieieney.

l. elaiin l. The combination with the platen ot a press. of sheetholding resilient lingers pivoted on said platen ior momentarily holdingthe delivery edge of the printed sheet a graiunt the platen and meanstor adjusting Fltlltl tingers vertically with respect to the platen.

The combination. with the platen ot a. press. ol' sheet holdingresilient lingers pivoted on said platen lt'or momentarily holding thedelivery edge of the printed sheet against the platen and means toradjusting said linvertieall and horizontally with IUSPCL't lo theplaten.

53. The combination with the platen of a presn. oi sheet holdingresilient lingers pivoted on Siiltl platen l0) momentarily holding thedelivery edge oi the printed sheet against the platen and means foradjusting said lingers vertically horizontally and laterally withrespect to the platen.

l. 'lae eou'ibination with the platen of a press, of sheet holdingresilient lingerspivoted on said platen tor ,ll'lOlTlBHlllll) holdingthe delirenv edge of the printed sheet against the platen and means foradjusting said lingers vertically, horizontally, laterally andlongitudinally with respect to the platen.

5. A sheet holding device (it the character setforth eomprisii'ig a basehaving an. up-

right post. a member adjuutahly mounted on said pi a curved. guide onbillltl member and a l'OHllleIlt sheet holding linger in said guide.

(3. ll. sheet holding device ol the character net 'lorth comprising abase, mean. for mount ing said base in adjustable parallel relation tothe platen of a prer said base having an upright tin-aided peat. aeleeve in threaded engagement with the POSY, a. channel earried by saidsleeve and a viehling resilient aheet holding: linger in said channel.

A sheet holding device ol the character described eoinprisin a base. athreaded post extending upwards from the bat-2e. a member in threadialengagement with the post to adjust ea id member thereon. a pa \vl on thebare tor maintaining said member in adjusted positiou on the post. acurved channel guide on said member and a resilient sheet holding lingerpassing through and. mounted in said ehannel guide.

Fl. lilAlNES llLUll l. 21).

